The animals have been devastating local agriculture and eating toxic, nuclear-contaminated food from around the accident site.
Mass graves and incinerators have been unable to cope with the quantity of boar corpses, shot by local hunters.
A quarantine zone near the Fukushima Daiichi nuclear plant where a 2011 meltdown leaked radioactive material into the surrounding countryside has been uninhabited by humans since the disaster.
However, boars remained in the area, unchecked by humans. Their precise number is unknown, but since 2014, the number of boars hunted has increased from 3,000 to 13,000, The Times reported.
The animals are now being killed faster than they can be buried.
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Hunters have buried the carcasses – often weighing 100kg – in their gardens, but they are often dug up by wild dogs. In desperation, the authorities are resorting to using incinerators to get rid of the corpses, although it has been difficult to find the workers to chop up the remains into pieces small enough to feed into the furnaces.
The animals were considered a local delicacy, but the nuclear contaminated boars are unfit for human consumption.
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